Henry howard



(No Model.)

H. HOWARD.

METHOD OF ELECTRIC WELDING.

No. 481,030., Patented Aug. 16,1892.

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NiTnD STATES PATENT OFFICE.

HENRY HOWARD, OF HALESOWEN, NEAR BIRMINGHAM, ENGLAND.

METHOD OF ELECTRIC WELDING.

SPECIFICATION forming part of Letters Patent No. 481,030, dated August 16, 1892.

Application filed May 31 1892- Serial No 434,948. (No specimens.)

T0 at whom it may concern:

Be it known that I, HENRY HOWARD, manufacturer, a subject of the Queen of Great Britain, residing at Ooombs WVood Tube IVorks, Halesowen, near Birmingham, England, have invented certain new and useful Improvements in Heating and WVelding by Electricity, of which the following is a specification.

This invention relates to heating and weldin g with the electric are where the work forms one pole and a pencil the other pole.

In many cases it is necessary or desirable to heat both sides of the work simultaneously or to weld at one heat a joint of considerable length, and it isdifficult and often impossible to do this with a single arc. On the other hand, it has heretofore been found impossible to employ two or more arcs simultaneously. According to this invention I do this in the following manner: All of the pencils are connected to one 1nainsay the negative main from the battery or other source of electricity, while the other mainsay the positive main is connected to the work, and in order to prevent any variation of the current used by one arc from affecting the steadiness of the other are or arcs I interpose between each pencil and the main a suitable resistance.

The drawing shows a diagrammatic view illustrating the invention.

A is a main connected to the negative pole of the battery or other source of electricity.

B is a main connected to the positive pole.

O O are pencils (usually of carbon) connected by wires D D to the mainA, the wires D having in them resistances E E. F is a tube to which the flange G is to be welded. This tube is connected to the main B and is mounted in a lathe (not shown) and caused to revolve with the two arcs playing on the joint.

What I claim is In heating and welding with the electric arc, the'combination of a main connected to one pole of the source of electricity, two or more pencils connected to the said main, two or more resistances each interposed between one of the pencils and the said main, and a second main connected at one end to the work to be heated or welded and at the other end to the other pole of the source of electricity.

HENRY HOlVARD.

Witnesses:

VVALTER MILLAGE, 3 S. Nicholas St, Worcester. W. H. R. LONGHUNT, Clerk in Holy Orders, Holdfast, Worcestershire. 

